Manual Basic Falling Dart Impact Tester – Ray-Ran

The Ray-Ran Manual Basic Falling Dart Impact Tester provides a basic method for determining the energy that causes thin flexible materials such as plastic film, paper, and composite sheets to fail under specified conditions of impact from a free-falling dart. The energy required to cause Initial Failure to the test specimen is expressed in terms of the dart’s weight which would result in the failure of 50% of the specimens being tested. The instrument complies with the ASTM D1709 Method A& B and ISO7765 part 1.

 

 

The methods of holding the test specimen and releasing the dart are designed so that they may be accurately repeated for each test performed. Test specimens are simply clamped in the unique two-piece clamp system which gives a constant tension across the surface area of the specimen ensuring test repeatability. A dart of a known weight is then allowed to free fall and hit the sample. The addition or removal of known weights determines the Initial failure of the sample. To comply with the relevant test standards, a fixed dart drop height of 660mm and 1 ½” spherical radius tup (method A,) and an optional 1524mm height and 2” spherical radius (method B) are used. The dart release mechanism is pneumatically actuated and requires the use of both hands to release the dart to ensure maximum operator safety. A clamp guard is also supplied to ensure the operator’s safety from falling and rebounding darts which can be removed for easy dart retrieval.

The apparatus comes supplied with digital counters to record Fail and non-fails and also keep track of the total number of tests conducted.

Fails and Non fails are manually plotted on graph paper to give the test result.

An optional floor-mounted stand and method B testing kit are available.

Optional ancillaries

Method B test kit (includes) – 2” stainless steel tup, weight set 2 x 15g, 8 x 45g, 8x 90g, 1524mm height post, remote dart clamp switch.
Floor mounted stand
Phenolic, Stainless steel, Aluminum, Composite Darts
Custom Darts on request